Grouting composition

Details Grouting composition Grouting composition

1990-10-23

1991-06-04

Morris, Theodore

Compositions: coating or plastic

Coating or plastic compositions

Inorganic settable ingredient containing

C04B 2424, C04B 2402

Patent

active

050210947

ABSTRACT:
A grouting composition for sealing a borehole or other cavity contains 90-99.9% finely divided water swellable clay and 0.1-10% polyacrylate thinner having a molecular weight of about 5,000 to 95,000. The grouting composition is mixed with fresh water to provide a completely reswellable, unflocculated, easily placed, low permeability sealing composition. The thinner allows a very high concentration of water-swellable clay in the composition. A preferred grouting composition contains 98-99.9% sodium bentonite and 0.1-2% polyacrylate thinner of molecular weight of about 2,000 to 50,000. In use, 50lb. of the preferred grouting composition is mixed with 11-14 gallons of fresh water, to provide a grouting mixture which includes about 25-40% reswellable solids.

REFERENCES:
patent: 4953620 (1990-09-01), Bloys et al.
patent: 4964918 (1990-10-01), Brown et al.

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